Chapter 5 Input. Chapter 5 Objectives Define input List characteristics of a keyboard Describe...

Chapter 5Input

Chapter 5 Objectives

Define inputDefine input

List characteristics of a keyboardList characteristics of a keyboard

Describe different mouse typesand how they work

Describe different mouse typesand how they work

Summarize how pointing devices workSummarize how pointing devices work

Explain how voice recognition worksExplain how voice recognition works

Describe various input devicesfor PDAs, Tablet PCs, and smart phones

Describe various input devicesfor PDAs, Tablet PCs, and smart phones

Explain how a digital camera worksExplain how a digital camera works

Describe uses of PC video cameras,Web cams, and video conferencing

Describe uses of PC video cameras,Web cams, and video conferencing

Discuss various scanners and reading devices and how they work

Discuss various scanners and reading devices and how they work

Explain the types of terminalExplain the types of terminal

Summarize the various biometric devicesSummarize the various biometric devices

Identify alternative input devices for physically challenged users

Identify alternative input devices for physically challenged users

Next

What Is Input?

What is input?

p. 230 and 232 Fig. 5-1 Next

Input device is any hardware component used to enter data or instructions

Data or instructions entered into memory of computer

What Is Input?

What are the two types of input?

p. 230 Fig. 5-2 Next

Unprocessed text, numbers, images, audio, and video

Instructions Programs Commands User responses

Data

The Keyboard

How is the keyboard divided?


Typing area Numeric keypad Function keys, special

keys that issue commands

The Keyboard

What are alternative forms for commands?


MICROSOFT WORD KEY COMBINATION EQUIVALENTS

Key Menu |Command Combination Command Button

Copy Shift+F2 or Edit | CopyCtrl+C

Open Ctrl+F12 File | Open

Paste Ctrl+V Edit | Paste

Many programs allow you to use key combination, menu, or button to obtain same result

The Keyboard

What is the insertion point?


Blinking vertical bar that indicates where next character you type will display

Pointer changes location and shape as you move mouse or other pointing device

The Keyboard

What is a cordless keyboard?


Communicate with a receiver attached to a port on the system unit

The Keyboard

What are other types of keyboards?


Notebook and many handheld computers have built-in keyboards

Pointing Devices

What is a mouse?


Pointing device that fits under palm of hand Pointing device controls

movement of pointer, also called mouse pointer

Mechanical mouse has rubber or metal ball on underside

mouse buttonswheel button

mouse pad

ball

Click to view Web Link,click Chapter 5, Click Web Linkfrom left navigation, then click Mouse below Chapter 5

Pointing Devices

What is an optical mouse?


No moving mechanical parts inside

Senses light to detect mouse’s movement

More precise than mechanical mouse

Connects using a cable, or wireless

Pointing Devices

How do you use a mouse?

p. 236 Fig. 5-10 Next

Step 1. Place the mouse toward the right of the mouse pad.

Step 2. Move the mouse diagonally toward the left until the pointer is positioned on the Microsoft Outlook icon.

As you move mouse, pointer on screen moves

Presswheelbutton

Presswheelbutton

Right-drag

Right-drag

Right-click

Right-click

Triple-click

Triple-click

Double-click

Double-click

Pointing Devices

What are common mouse operations?

p. 237 Next

PointPoint

ClickClick

DragDrag

Rotate wheel

Rotate wheel

Other Pointing Devices

What is a trackball?

p. 238 Fig. 5-12 Next

Stationary pointing device with a ball on its top

To move pointer, rotate ball with thumb, fingers, or palm of hand


What are a touchpad and a pointing stick?

p. 238 Figs. 5-13—5-14 Next

Touchpad is small, flat, rectangular pointing device sensitive to pressure and motion

Pointing stick is pointing device shaped like pencil eraser positioned between keys on keyboard

Click to view Web Link,click Chapter 5, Click Web Linkfrom left navigation, then click Touchpad and Pointing Stick below Chapter 5


What are a joystick and a wheel?

p. 239 Fig. 5-15 Next

Joystick is vertical lever mounted on a base

Wheel is steering-wheel-type input device Pedal simulates

car brakes and accelerator


What is a light pen?

p. 239 Fig. 5-16 Next

Handheld input device that can detect light Press light pen against

screen surface and then press button on pen


What is a touch screen?

p. 240 Fig. 5-17 Next

Touch areas of screen with finger

Often used with kiosks

Click to view Web Link,click Chapter 5, Click Web Linkfrom left navigation, then click Touch Screen below Chapter 5


What is a stylus?

p. 240 Fig. 5-18 Next

Looks like a ballpoint pen, but uses pressure to write text and draw lines

Used with graphics tablets, flat electronic boards

Click to view Web Link,click Chapter 5, Click Web Linkfrom left navigation, then click Stylus and Pen below Chapter 5


Where is a stylus used?

p. 240 Fig. 5-19 Next

Some desktop computers Many mobile computers

and devices Handwriting recognition

software translates handwriting into characters that computer can process

Voice Input

How does voice recognition work?

p. 242 Fig. 5-20 Next

Step 2. An analog-to-digital converter (ADC) translates sound waves into digital measurements computer can process. Measurements include pitch, volume, silences, and phonemes. Phonemes are sound units such as aw and guh.

10010111010110101100001101

Step 3. Software compares spoken measurements with those in its database to find a match or list of possible matches.

Matches

Step 4. To narrow a list down, software presents user with a list of choices or uses a natural language component to predict most likely match. User may correct any selection made by software.

Natural Language Engine

Click to view Web Link,click Chapter 5, Click Web Link from left navigation, then click Voice Input below Chapter 5

Step 1. A user dictates text into a microphone.

Voice Input

What is a MIDI (musical instrument digital interface)?

p. 243 Fig. 5-21 Next

External device, such as electronic piano keyboard, to input music and sound effects

PDAs, Tablet PCs, and Smart PhonesHow is a data entered into a PDA?

p. 244 Fig. 5-22 Next

PDAs, Tablet PCs, and Smart PhonesWhat is a portable keyboard?

p. 245 Fig. 5-23 Next

Full-sized keyboard you conveniently attach to and remove from PDA

PDAs, Tablet PCs, and Smart PhonesWhat is a docking station?

p. 245 Fig. 5-24 Next

External device that holds mobile computer

Provides connections to peripherals

PDAs, Tablet PCs, and Smart PhonesWhat is a smart phone?

p. 246 Fig. 5-25 Next

Users can input and send text messages, graphics, pictures, video clips, and sound files

Many have a built-in or attachable camera

Digital Cameras

What is a digital camera?

p. 247 Fig. 5-26 Next

Allows you to take digital pictures

Images viewable immediately on camera Download to

computer Post pictures

to Web

Digital Cameras

How does a digital camera work?

p. 248 Fig. 5-27 Next

Step 1. Point to the image to photograph and take picture. Light passes into the lens of the camera.

Step 2. Image is focused on a chip called a charge-coupled device (CCD).

Step 3. CCD generates an analog signal that represents the image.

Step 4. Analog signal is converted to digital signal by analog-to-digital converter (ADC).

Step 5. Digital signal processor (DSP) adjusts quality of image and usually stores digital image on miniature mobile storage media in the camera.

Step 6. Images are transferred to a computer’s hard disk by plugging one end of the cable into a camera and the other end into a computer; or images are copied to hard disk from storage media used in the camera.

Step 7. Using software supplied with the camera, images are viewed on screen, incorporated into documents, edited, and printed.

Digital Cameras

What is resolution?

p. 249 Fig. 5-28 Next

Sharpness and clarity of image The higher the resolution, the better the image

quality, but the more expensive the camera Pixel (picture element)

is single point in electronic image Greater the number of

pixels, the better the image quality

Video Input

What is video input?

p. 250 Fig. 5-29 Next

Process of entering full-motion images into computer

Video capture card is adapter card that converts analog video signal into digital signal that computer can use

Digital video (DV) camera records video as digital signals

Video Input

What are a PC video camera and a Web cam?

p. 250 Fig. 5-30 Next

PC video camerac—cDV camera used to capture video and still images, and to make video telephone calls on Internet Also called PC camera

Web camc—cvideo camera whose output displays on a Web page

Click to view video

Click to view Web Link,click Chapter 5, Click Web Linkfrom left navigation, then click PC Video Cameras below Chapter 5

Video Input

What is video conferencing?

p. 251 Fig. 5-31 Next

Whiteboard is another window on screen that can display notes and drawings simultaneously on all participants’ screens

Two or more geographically separated people who use network on Internet to transmit audio and video data

Scanners and Reading Devices

What is a scanner?

p. 252 Fig. 5-32 Next

Flatbed

Pen or Handheld

Sheet-fed

Drum

Light-sensing device that reads printed text and graphics Used for image processing,

converting paper documents into electronic images

Click to view animation

Click to view Web Link,click Chapter 5, Click Web Linkfrom left navigation, then click Scanner below Chapter 5


How does a flatbed scanner work?

p. 253 Fig. 5-33 Next

Step 2. Bright light moves underneath scanned document.Step 3. Image of the document is

reflected into a series of mirrors.

Step 1. Document to be scanned is placed face down on the glass window.

Step 6. Users can print image, e-mail it, include it in a document, or place it on a Web page.

Step 4. Light is converted to analog electrical current that is converted to digital signal by an analog-to-digital converter (ADC).

Step 5. Digital information is sent to memory in the computer to be used by illustration, desktop publishing, or other software; or it is stored on disk.


What is an optical reader?

p. 254 Fig. 5-34 Next

Optical character recognition (OCR) reads characters in OCR font

Optical mark recognition (OMR) reads hand-drawn pencil marks, such as small circles

Bar code scanner

Device that uses light source to read characters, marks, and codes and then converts them into digital data


What is a turnaround document?

p. 255 Fig. 5-35 Next

Document that you return to the company that sent it Portion you return has

information printed in OCR characters


What is a bar code reader?

p. 255 Fig. 5-36 Next

Uses laser beams to read bar codes


What is a bar code?

p. 255 Fig. 5-37 Next

Identification code that consists of a set of vertical lines and spaces of different widths

Universal Product Code (UPC)


What are some widely used bar codes?

p. 256 Fig. 5-38 Next

What is a magnetic-ink character recognition (MICR) reader?


p. 257 Fig. 5-39 Next

Can read text printed with magnetized ink Banking industry almost exclusively uses MICR

for check processing


What is a data collection device?

p. 257 Fig. 5-40 Next

Obtains data directly at location where transaction or event takes place

Transmits data over network or Internet

Terminals

What is a point of sale (POS) terminal?

p. 258 Fig. 5-41 Next

Records purchases, processes credit or debit cards, and updates inventory Swipe credit or debit card

through card readerc—creads customer’s personal data from magnetic strip

Terminals

What is an automated teller machine (ATM)?

p. 259 Fig. 5-42 Next

Self-service banking machine that connects to a host computer through a network

Terminals

What is a smart display?

p. 259 Fig. 5-43 Next

Thin monitor that detaches from computer to function as portable wireless touch screen

Biometric Input

What is biometrics?

p. 260 Fig. 5-45 Next

Authenticates person’s identity by verifying personal characteristic Fingerprint scanner captures

curves and indentations of fingerprint

Hand geometry system measures shape and size of person’s hand

Click to view video

Click to view Web Link,click Chapter 5, Click Web Linkfrom left navigation, then click Biometric Input below Chapter 5

Biometric Input

What are examples of biometric technology?

p. 261 Figs. 5-46—5-47 Next

Voice verification system compares live speech with stored voice pattern

Signature verification system recognizes shape of signature

Iris recognition system reads patterns in blood vessels in back of eye Biometric data is sometimes stored

on smart card, which stores personal data on microprocessor embedded in card

Enhanced keyboard or ergonomic keyboard Mouse Stylus for PDA Joystick or wheel 30-bit 600 × 1200 ppi color scanner 1- or 2-megapixel digital camera Headset that includes a microphone PC video camera Smart display

Putting It All Together

What are recommended input devices for home users?

p. 262 Fig. 5-48 Next

Home

Enhanced keyboard or ergonomic keyboard Mouse Stylus and portable keyboard for PDA or digital pen

for Tablet PC 36-bit 600 × 1200 ppi color scanner 1- or 2-megapixel digital camera Headset that includes a microphone PC video camera


p. 262 Fig. 5-48 Next

Small Office/Home Office (SOHO)

What are recommended input devices for small office/home office users (SOHO)?

Wireless mouse for notebook computer Trackball, touchpad, or pointing stick on notebook computer Stylus and portable keyboard for PDA or digital pen for Tablet PC 2- or 3-megapixel digital camera Headset that includes a microphone Fingerprint scanner for notebook computer


What are recommended input devices for mobile users?

p. 262 Fig. 5-48 Next

Mobile

Enhanced keyboard or ergonomic keyboard Mouse Stylus and portable keyboard for PDA or digital pen for Tablet PC Touch screen Light pen 42-bit 1200 × 1200 ppi color scanner OCR/OMR readers, bar code scanners, MICR reader, or data

collection devices Microphone Video camera for video conferences Fingerprint scanner or other biometric device


p. 262 Fig. 5-48 Next

Large Business

What are recommended input devices for large business users?

Enhanced keyboard or ergonomic keyboard Mouse Stylus and portable keyboard for PDA Pen for graphics tablet 48-bit 1200 × 1200 ppi color scanner 5- or 6-megapixel digital camera Headset that includes a microphone PC video camera


What are recommended input devices for power users?

p. 262 Fig. 5-48 Next

Power

Input Devices for Physically Challenged Users

What input devices are available for those with physical limitations?

p. 263 Figs. 5-49—5-50 Next

Keyguard allows users to rest hands on keyboard without accidentally pressing keys

Head-mounted pointer controls pointer on screen

New developments include gesture recognition and computerized implant devices

Summary of Input

Keyboard, mouse, and otherpointing devices

Keyboard, mouse, and otherpointing devices

Voice inputVoice input

Input devices for PDAs, Tablet PCs,and smart phones

Input devices for PDAs, Tablet PCs,and smart phones

Digital camerasDigital cameras

Video InputVideo Input

Scanners and reading devicesScanners and reading devices

TerminalsTerminals

Biometric inputBiometric input

Input devices for physicallychallenged users

Input devices for physicallychallenged users

Chapter 5 Complete

Chapter 5 Input. Chapter 5 Objectives Define input List characteristics of a keyboard Describe...

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